MOVABLE STAND FOR AN EXTRUSION PUMP

Abstract

The invention relates to a movable stand (16) for an extrusion pump (10) that has a drive (14) and a transmission (12), the stand comprising a horizontal stand platform (18, 20, 70), which has wheels (22), and comprising at least one carrier (32, 34), which extends vertically with respect to the stand platform (18, 20, 70) and is connected to a carrying body (40), wherein the carrying body (40) comprises: a support (50) for the extrusion pump (10) and a fine vertical adjustment device (48) for the support (50); a carrying wall (54), on which the unit consisting of the transmission (12) and drive (14) of the extrusion pump (10) is fastened; and a housing (60), which surrounds a shaft (58) connecting the transmission (12) to the extrusion pump (10). The invention is characterised in that the carrying body (40) as a whole is detachably connected to the stand platform (18, 20, 70) only via the carrier (32, 34) and can be vertically adjusted with respect to the stand platform (18, 20, 70), in particular with respect to the carrier (32, 34).

Claims

1. Movable stand (16) for an extrusion pump (10) that has a drive (14) and a gearbox (12), which stand comprises a horizontal stand platform (18, 20, 70), which has wheels (22), at least one carrier (32, 34), which extends vertically with respect to the stand platform (18, 20, 70) and is connected to a carrying body (40), which carrying body (40) in turn comprises: a support (50) for the extrusion pump (10) and a fine vertical adjustment device (48) for the support (50); a carrying wall (54), on which the unit consisting of the gearbox (12) and the drive (14) of the extrusion pump (10) is fastened; and a housing (60), which surrounds a shaft (58) that connects the gearbox (12) to the extrusion pump (10) characterized in that the carrying body (40) as a whole is detachably connected to the stand platform (18, 20, 70) only via the carrier (32, 34) and can be vertically adjusted with respect to the stand platform (18, 20, 70), in particular with respect to the carrier (32, 34).

2. Movable stand according to claim 1, characterized in that the carrying body (40) is adapted to be arranged in at least two different orientations with respect to the stand platform (18, 20, 70).

3. Movable stand according to claim 1 or 2, characterized in that the housing (60) is designed to be telescopic in order to compensate for different lengths of shafts (58) between the gearbox (12) and the extrusion pump (10).

4. Movable stand according to any one of the preceding claims, characterized in that the vertical carrier (32, 34) has a plurality of connecting means (38) arranged the one above the other, in particular at a uniform distance from one another, which connecting means (38) are associated with connecting means (42, 44) of the carrying body (40).

5. Movable stand according to claim 4, characterized in that the connecting means of the carrying body (40) are constituted by bolts (42) and nuts (44), and the connecting means of the carrier (32, 34) are constituted by bores (38).

6. Movable stand according to any one of the preceding claims, characterized in that the carrying body (40) has a carrying base (46) that extends away from the carrying wall (54) on the side remote from the gearbox (12) and the drive (14) in a manner substantially perpendicular to the carrying wall (54), with the support (50) with the fine vertical adjustment device (48) being provided at the free end of the carrying base (46).

7. Movable stand according to claim 6, characterized in that the carrying base (46) is flush with the support (50) on the side remote from the housing (60), or it extends beyond the support (50).

8. Movable stand according to claim 6 or 7, characterized in that the housing (60) is arranged on the carrying base (46).

9. Movable stand according to claim 8, characterized in that a part (52a) of the housing sidewalls (52) is connected to the carrying base (46), which in particular are materially connected thereto as one piece.

10. Movable stand according to any one of claims 6 to 9 above, in particular claim 9, characterized in that the carrying body (40) is connected to the vertical carrier (32, 34), in particular is connected to a vertical carrier (32, 34) on each side, via sidewalls, in particular via the part (52a) of the housing sidewalls (52) that is connected to the carrying base (46).

11. Movable stand according to any one of claims 9 or 10 above, characterized in that the carrying base (46), in particular also the housing sidewalls (52) that are connected to the carrying base (46), tapers or taper in the direction of its free end, in particular evenlyin a V-shape in top view of the carrying base.

12. Movable stand according to any one of the preceding claims, characterized in that said vertical carrier (32, 34) is detachably connected to the stand platform.

13. Movable stand according to any one of the preceding claims, characterized in that two vertical carriers (32, 34) are provided, each of identical design.

14. Movable stand according to any one of the preceding claims, characterized in that the stand platform has two horizontal stand carriers (18, 20) each having two detachably mounted wheels (22) which are connected to each other at least via the carrying body (40) and the carrier (32, 34).

15. Movable stand according to any one of the preceding claims, characterized in that the wheels (22) of the stand platform (18, 20, 70) are adjustable with respect to the vertical distance from the stand platform (18, 20, 70)heightas well as with respect to the distance transverse to the longitudinal direction of the stand platform (18, 20, 70)width.

16. Movable stand according to claim 14 or 15, characterized in that the distance between the stand carriers (18, 20) is greater than the maximum extent of the drive (14) transverse to its longitudinal axis.

17. Movable stand according to any one of the preceding claims, characterized in that the carrying body (40) is adapted to be arranged on the carrier (32, 34) or carriers (32, 34) at least at a height which is greater than the maximum extent of the drive (14) and gearbox (12) along the longitudinal axis.

18. Movable stand according to any one of the preceding claims, characterized in that plural sets of pairs of carriers (32, 34) of different lengths are provided.

19. Movable stand according to any one of the preceding claims, characterized by being symmetrical about its longitudinal median plane.

20. Movable stand according to any one of claims 6 to 19 above, characterized in that the support (50) is adjustable along the carrying base (46).

Description

[0033] Throughout the description, the claims and the drawings, those terms and associated reference signs are used as are stated in the list of reference signs below. In the drawings,

[0034] FIG. 1 is a perspective viewas seen at an angle from aboveof an extrusion pump with drive shaft, gearbox and drive motor on a movable stand according to one embodiment of the invention, in a first installation position thereof;

[0035] FIG. 2 is an exploded view of FIG. 1;

[0036] FIG. 3 is a perspective viewas seen at an angle from aboveof the extrusion pump with drive shaft, gearbox and drive motor on a movable stand according to the embodiment of the invention, in a second installation position thereof; and

[0037] FIG. 4 is an exploded view of FIG. 3.

[0038] The views of FIGS. 1 and 2 show an extrusion pump 10 with a gearbox 12 and an electric motor 14 on a movable stand 16 in a first installation position thereof, and the views of FIGS. 3 and 4 show the extrusion pump 10 with the gearbox 12 and the electric motor 14 on the movable stand 16 in a second installation position thereof.

[0039] The movable stand 16 is provided with two stand carriers 18 and 20, at the free end of each wheels 22 are mounted that are vertically adjustable, i.e. with respect to each stand carrier 18, 20. The wheels 22 are mounted in a carrying plate 24 so as to be rotatable about an axis of rotation and are provided with a locking brake 26. The axis of rotation extends substantially perpendicular to the carrying plate 24. The carrying plate 24 has four threaded rods 28 that engage in holes in the stand carrier 18, 20. Threaded nuts 30 arranged on both sides of the stand carrier 18, 20 and on the threaded rod 28 allow the carrying plate 24 and thus the wheel 22 each to be vertically adjusted.

[0040] A vertical carrier 32, 34 is mounted approximately centrally on each stand carrier 18, 20. For this purpose, the stand carrier 18, 20 has two threaded pins 36a, which engage in corresponding bores of the vertical carrier 32, 34 at its lower end and are retained in place by threaded nuts 36b.

[0041] The vertical carrier 32, 34 each has two rows 38a, 38b of holes 38 arranged the one above the other and equidistant from one another, for mounting a carrying body 40 between the vertical carriers 32, 34. Depending on the desired height, the carrying body 40 is mounted using four bolt 42/nut 44 connections through the holes 38 of the vertical carrier 32, 34. In this case, two bolts 42 are inserted into bores 38, which are arranged the one above the other, of a first row 38a of the vertical carrier 32, 34, and two bolts 42 are inserted into bores 38, which are arranged the one above the other, of a second row 38b of the vertical carrier 32, 34 and retained in place by nuts 44.

[0042] The carrying body 40 includes a carrying base 46 which, as viewed from above, forms an isosceles trapezoid and tapers toward its free end.

[0043] A fine vertical adjustment device 48 and a support 50 connected to the extrusion pump 10 are provided at the free end. The fine vertical adjustment device 48 comprises three threaded pins 48a, which engage in elongated holes 48b of the carrying base 46 in the area of its free end. The threaded pins 48a are firmly connected to the support 50. Threaded nuts 48c on either side of the carrying base 46 are used to fix the threaded pins 48a in place, and rotating the threaded nuts 48c in one direction or the other can change the height of the support 50 in one direction or the other, allowing for fine vertical adjustment of the support 50 and thus of the extrusion pump 10. The adjustment range is between 1 mm and 10 mm approximately. In addition, the fine vertical adjustment device 48 can be used to displace the support 50 in the longitudinal direction of the carrying base 46 via the elongated holes 48b as required, in order to compensate for the different distances between the extrusion pump 10 and the gearbox 12.

[0044] A sidewall 52 extending perpendicular to the carrying base 46 is provided on each side of the carrying base 46. Sidewall 52 has three parts 52a, 52b and 52c. Of these, part 52a extends furthest away from the carrying base 46 and forms the sidewall of a first housing part 54. Adjacent to this, in the direction of the free end of the carrying base 46, is the next part 52b, which has an extent in a direction away from the carrying base 46 that corresponds approximately to the width of the vertical carrier 32, 34 and is smaller than the first part 52a of sidewall 52. The third part 52c delimits the support 50 with the fine vertical adjustment device 48 and extends away from the carrying base 46 only slightly enough so that, even when the support 50 is in its maximum extended position relative to the carrying base 46, the support 50 will still be covered laterally by the fine vertical adjustment device 48. Sidewall 52 thus decreases in height in two steps towards the free end.

[0045] On the side remote from the free end of the carrying base 46 of the carrying body 40, a carrying wall 54 is screw-connected to an inwardly bent ledge 52d of the first part 52a of sidewall 52. Carrying wall 54 has a central circular recess 56 made therein through which a drive shaft 58 extends that connects the extrusion pump 10 to the gearbox 12. The carrying wall 54 forms the rear wall of a housing 60 that surrounds the drive shaft 58. On the side of the carrying wall 54 facing away from the carrying base 46, the gearbox 12 is screw-connected to the carrying wall 54. The electric motor 14 is arranged below the gearbox 12 to drive the extrusion pump. Electric motor 14 and gearbox 12 have a longitudinal axis that is substantially vertical to a contact surface of the wheels 22. The gearbox 12 and the electric motor 14 are carried solely by the carrying wall 54.

[0046] A housing cover 62 extends up to the carrying wall 54 towards the free end along the length of the first part 52a of sidewall 52. At the end of the first part, a housing end wall 64 extends substantially perpendicularly toward the carrying base 46. The housing cover 62 and the housing end wall 64 are formed in one piece. The housing end wall 64 has a rectangular recess 66 made therein. The housing cover 62 is screw-connected to the carrying wall 54 via a bent ledge 62a.

[0047] The carrying wall 54, the first part 52a of sidewall 52, the housing top 62, and the housing end wall 64 form a first fixed housing part 60a of housing 60.

[0048] A second rectangular housing part 60b is slidably mounted on the carrying base 46 via slide rails 68 relative to the first housing part 60a. The second housing part 60b is open to the carrying base 46 and its sidewalls 60c engage the slide rails 68. A recess 60d for the drive shaft 58 is made in each end face of the second housing part 60b.

[0049] The cross-section of the second housing part 60b corresponds approximately to the recess 66 of the first housing part 60a. The second housing part 60b is slidable relative to the first housing part 60a. For this purpose, the length of the second housing part 60b is such that a portion of the second housing part 60b will always remain within the first housing part. The housing 60 is thus designed to be telescopic. This can compensate for varying lengths of drive shafts 58 and different distances between the extrusion pump 10 and the gearbox 12.

[0050] FIGS. 3 and 4 are views of a different installation situation. The parts used are identical, except for the length of the vertical carriers 32, 34. However, the carrying body 40 is attached to the vertical carriers 32, 34 rotated by 90?. As a result, the longitudinal axes of electric motor 14 and gearbox 12 are aligned horizontally and the drive shaft 58 is aligned vertically. Because of the V-shape, each vertical carrier 32, 34 is inclined inwardly together with the associated stand carrier 18, 20, and the stand carriers 18, 20 are aligned parallel to each other.

[0051] In the installation situation as seen in FIGS. 1 and 2, a stabilizing wall 70 connects the stand carriers 18, 20 to each other below the vertical carrier. There is no such wall 70 in the installation situation shown in FIGS. 3 and 4.

[0052] In addition, the shorter vertical carrier 18, 20 of FIGS. 3 and 4 can also be used in addition to the longer vertical carriers 18, 20. The vertical carriers 18, 20 are U-shaped in cross-section and can be inserted into each other and thus stabilize each other.

[0053] The extrusion pump 10 is designed in particular as a gear pump.

[0054] Due to the modular design, different installation situations are made possible with one type of movable stand 16, and extrusion pumps 10 of different dimensions with a drive shaft 58, gearbox 12 and electric motor 14 can also be mounted thereon. Individually manufactured movable stands are thus no longer necessary.

LIST OF REFERENCE SIGNS

[0055] 10 extrusion pump [0056] 12 gearbox [0057] 14 electric motor [0058] 16 movable stand [0059] 18 left-hand stand carrier [0060] 20 right-hand stand carrier [0061] 22 wheel(s) [0062] 24 carrying plate for mounting wheel 22 to stand carrier 18, 20 [0063] 26 locking brake for wheel 22 [0064] 28 threaded rod for fastening wheel 22 [0065] 30 threaded nut for fastening wheel 22 [0066] 32 left-hand vertical carrier [0067] 34 right-hand vertical carrier [0068] 36a threaded pins of stand carrier 18, 20 [0069] 36b threaded nut for fastening vertical carrier 32, 34 [0070] 38 holes for fastening carrying body 40 [0071] 38a first row of holes 38 [0072] 36b second row of holes 38 [0073] 40 carrying body [0074] 42 bolt for fastening carrying body 40 [0075] 44 threaded nut for fastening carrying body 40 [0076] 46 carrying base [0077] 48 fine vertical adjustment device [0078] 48a threaded pin of fine vertical adjustment device 48 [0079] 48b oblong hole in carrying base 46 of fine vertical adjustment device 48 [0080] 48c threaded nut of fine vertical adjustment device 48 [0081] 50 support for extrusion pump 10 [0082] 52 sidewall [0083] 52a first part of sidewall 52 [0084] 52b second part of sidewall 52 [0085] 52c third part of sidewall 52 [0086] 54 carrying wall [0087] 56 circular recess [0088] 58 drive shaft [0089] 60 housing [0090] 60a first housing part [0091] 60b second housing part [0092] 60c sidewall of second housing part 60b [0093] 60d recess in second housing part 60b [0094] 62 housing cover of first housing part 60a [0095] 62a ledge of housing cover 62 [0096] 64 housing end wall of first housing part 60a [0097] 66 rectangular recess in first housing part 60a [0098] 68 slide rails [0099] 70 stabilizing wall which connects the two stand carriers 18, 20 to one another